Which component is NOT typically found in a standard grout mixture?

A standard grout mixture typically consists of water, cement, and sometimes admixtures to modify its properties. However, aggregates are generally not a typical component of grout. Grouts are specifically designed to fill gaps and provide a fluid consistency, which is better achieved with a mixture that has a more homogeneous consistency rather than one that includes larger aggregate materials.

The inclusion of water and cement is essential for the chemical reaction that results in hardening, while admixtures can enhance specific properties, such as flow or setting time. In contrast, aggregates—being coarser elements—would alter the characteristics of grout, making it more akin to concrete rather than grout, which is intended to be more fluid and less granular. This distinguishes grout from concrete, which is a composite material that relies heavily on aggregates for strength and stability.